{
  "bibcode": "2018GCN.23213....1S",
  "body": "T. Sakamoto (AGU), S. D. Barthelmy (GSFC),\nJ. R. Cummings (CPI), V. D'Elia (SSDC),\nH. A. Krimm (NSF/USRA), A. Y. Lien (GSFC/UMBC),\nC. B. Markwardt (GSFC), D. M. Palmer (LANL),\nM. Stamatikos (OSU), T. N. Ukwatta (LANL)\n(i.e. the Swift-BAT team):\n\nUsing the data set from T-239 to T+250 sec from the recent telemetry downlink,\nwe report further analysis of BAT GRB 180905A (trigger #859421)\n(D'Elia et al., GCN Circ. 23201).  The BAT ground-calculated position is\nRA, Dec = 91.038, -4.592 deg which is\n  RA(J2000)  =  06h 04m 09.2s\n  Dec(J2000) = -04d 35' 31.9\"\nwith an uncertainty of 1.7 arcmin, (radius, sys+stat, 90% containment).\nThe partial coding was 29%.\n\nThe mask-weighted light curve shows a weak long pulse that starts\nat ~T-60 s and ends at ~T+150 s. Note that the burst came into the BAT\nfield of view at T-84 s, and BAT entered the SAA after ~ T+250 s. Therefore,\nthere might be additional burst emission before and after the available event\ndata range. T90 (15-350 keV) is 165.3 +- 28.9 sec (estimated error including\nsystematics).\n\nThe time-averaged spectrum from T-58.9 to T+146.7 sec is best fit by a simple\npower-law model.  The power law index of the time-averaged spectrum is\n1.60 +- 0.12.  The fluence in the 15-150 keV band is 4.2 +- 0.3 x 10^-6 erg/cm2.\nThe 1-sec peak photon flux measured from T-2.09 sec in the 15-150 keV band\nis 1.0 +- 0.3 ph/cm2/sec.  All the quoted errors are at the 90% confidence\nlevel.\n\nThe results of the batgrbproduct analysis are available at\nhttp://gcn.gsfc.nasa.gov/notices_s/859421/BA/",
  "circularId": 23213,
  "createdOn": 1536250328000,
  "email": "amy.y.lien@nasa.gov",
  "subject": "GRB 180905A, Swift-BAT refined analysis",
  "submitter": "Amy Lien at GSFC  <amy.y.lien@nasa.gov>",
  "eventId": "GRB 180905A"
}